Coal-mining machine.



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No.A 646,975.

(No Model) No. 646,975;` Patented Apr. lo, |900.

T. M. GALLAHER. coALmmmG mAcHAmE.

(No Model.) lApplication led May 1, 1899.) 2 shaun-Sheet 2" llll'llllllllllum lumen/Imc Yu! cams vertus ou, wumumm wmmarcw. n. c,

ivrTnD STATES PATENT OFFICE,

THOMAS M. GALLAHER, OF BELLAIRE, OHIO.

coAL-ivilNlNe MACHINE.

SPECIFICATION forming part of Letters Patent No. 646,975, dated April10, 1900. Application filed May l, 1,899. Serial No. 715,207. (Nomodel.)

.To @ZZ whom zit may con/cern.-

Be it known that I, THOMAS M. GALLAHER, a citizen of the United States,residing at Bellaire, in the county of Belmont and State of Ohio, haveinvented a certain new and useful Improvement in Coal-Mining Machines,of which the following is aspeciication, refaerence being had to theaccompanying drawings.

This improvement relates to that class of mining-machines in which thecutters have an oscillating or semirotary motion and is designed toproduce a machine of this class which will be easy to operate,convenient in use, rapid in operation, and not likely to get out oforder.

To these ends the invention consists in the peculiarconstruction'hereinafter more partic- `ularly described and thendefinitely claimed at the end hereof.

In the accompanying drawings, Figure 1 is a plan of a machineconstructed according to myimprovement. Fig. 2 is an elevation of thesame. Fig. 3 is a vertical section on the line o; oc on Fig. 1. Figs. 4and are details which will be more fully described hereinafter.

Referring now to the details of the drawings by numerals, 1 1 indicatetwo rails firmly secured on the iioor of the mine by jacks 2. On theserails is set a carriage 3, comprising two rails 3 and end pieces 3", onwhich rails runs the frame 4,' having flanged Wheels 5,

and which may be moved from end to end of the carriage 3 by a screw 6,mounted in the end pieces 3". To move this carriage up toward the faceof the coal, I provide a shaft 7, running in the end pieces 3", whichcarries at each end a lever S, by which the shaft 7 may be rocked. Tothese levers are pivoted ratchets 9, which operate on racks 11,extending alongside of the rails 1 l, so that by operating either of thelevers the carriage may be moved forward on the said rails toward theface of the coal. By reversing the ratchets the carriage may be runbackward.

Running crosswise of the frame 4 are two bars 12, which form bearingsfor a vertical shaft 13, having at its lower end a crank 14 andcounterbalance 15 and on its upper end a bevel-gear 1G, which mesheswith a bevelpinion 17 on a shaft 18, which may be operated by anysuitable or convenient power;

but I prefer an electric motor (notshown) which may be connecteddirectly on said shaft 18.

Pivoted to an extension 19 of the side of the frame 4is a swinging leveror carrier 20, formed of two bars 2l,connected by blocks 22, the barsand blocks being all rigidly secured togetheri In the outer end of thiscarrier is mounted the cutting device, formed of a cutter-head 23, inwhich are set the cutters 24, secured by bolts 25, which clamp theplates 26 at the edge of the cutter-head firmly upon the cutters. Thecutter-head oscillates on the bolt 27, which, it will be seen, is seteccentrically in the cutterhead for a purpose hereinafter mentioned. At28 is shown a bolt which forms a pivot for the pitman 29, whose otherend is connected to the crank 14, so that as the crank revolves thecutter-head is given an oscillating motion.

The shaft 13, in addition to the bevel-Wheel 16, carries asprocket-wheel 30, which gives motion, by means of a chain 3l, toanother sprocket-wheel 32, on the shaft of which is a spur-gear 33,meshing with another gear 34 on a shaft 35, mounted in the carrier 20,and on whose lower end is a sprocket-wheel 36, around which is a chain37, that runs around another sprocket-wheel 38, working on a pin 39, setin the bar 2l, which pin passes through a curved slot 40, formed in thecutter-head 23.

The links of the chain 37 have at certain intervals cross-bars 4l, onwhich is riveted sheet-metal clearers or Scrapers 42 for keeping thechannel clear of the cut coal.

In the corner of the frame 4 is set a plate or casting 43, hav ing acurved slot 44, through which and the carrier 2O passes a bolt 45, sothat the carrier may be adjusted in any desired position within therange of the slot, which is made of a considerable length, so that thecarrier may be turned around to set parallel with the carriage, whichwill be found convenient in moving it through the passages of the mines.It will also be found very useful iu starting the work and in operatingin narrow passages and corners, where the niachine could not be used ifthe carrier was not adjustable. Y

Although I show a screw for moving the frame on the carriage, I do notlimit myself to this, as any other suitable mode of moving the frame maybe adopted--such, for in- IOO stance, as the device used for moving thecarriage on the rails.

The operation is as follows: Motion being given to the shaft 1S in anyconvenient man ner, the bevel-pinion'17 and the gear 16 operate thecrank 14, which gives an oscillating or partial rotary motion to thecutterhead 23, causing the cutters to act on the coal, and as the frame4 is moved along by the screw or ratchet, as the case may be, a channelis cut in the face thereof, the material falling down in the channelbeing rapidly removed by the scraper-s 42, which will prevent anyjamming of the cutters in the channel. When a cut has been made alongthe face of the coal, the frame 4 is moved backward by reversing thescrew or ratchet and one of the levers 8 operated, which will cause theratchets 10 to engage With the racks 1l, and thus move the carriage 3and cutters forward toward the face of the coal when the above operationis repeated.

The cutters 24 are set in the manner shown in Fig. 4, so as to cut acomparatively-wide channel.

By setting the cutter-head eccentrically each cutter acts on the coal,cutting its own way in the channel. rllhe same effect would be produced,however, by projecting each cutter a little farther out than thepreceding one; but I prefer to set the cutter-head eccentrically, aseach cutter thus receives equal support.

I do not limit myself to the exact details of construction, as they maybe varied in many Ways Without departing from the spirit of myinvention.

What I claim as new is- 1. In a mningmachine, the combination of aframe, a carrier having one end pivoted on said frame, a cutter-headmounted on a shaft near the extremity of the other end of the carrier, asprocket-wheel mounted on a shaft on the outer end of said carrierbeyond the shaft of the cutter-head, a second sprocketwheel mounted onthe inner end of the carrier, a clearing-chain working independently ofthe cutter-head and means for giving motion to the secondsprocket-wheel, substanf tially as described.

2. Ina mining-machine, the combination of a carrier, a slottedcutter-head mounted thereon, a sprocket-wheel below the cutter-head, asupport therefor passing through the slot inthe cutter-head and securedin the carrier, and a clearing-chain passing around said sprocket-wheel,substantially as described.

3. In a mining-machine, the combination of a suitable frame, acari-ier2O pivoted thereon, and a shaft 13 running in said frame, asprocket-wheel 30 on said shaft, a second sprocket-wheel 32 mounted on ashaft forming a pivot for the carrier 20, a sprocket-chain 3l connectingsaid sprocket-wheels, a spur- Wheel 33 on said last-mentioned shaft,another spur-wheel 34, a shaft 35 carrying said spur-wheel 34 and asprocket-wheel 36 and mounted on the inner end of the carrier, asprocket-wheel 38 on the outer end of the car* rier, and aclearing-chain 37 carried by said sprocket-wheels 36 and 38,substantially as described.

vIn testimony whereof I affix my signature, in the presence of twowitnesses, this 28th day of April, 1899.

THOMAS M. GALLAHER.

